--- old/src/hotspot/share/gc/g1/g1FullCollector.hpp	2018-02-26 10:51:00.047304143 +0100
+++ new/src/hotspot/share/gc/g1/g1FullCollector.hpp	2018-02-26 10:50:59.763292892 +0100
@@ -85,10 +85,6 @@
   void verify_after_marking();
 
   void run_task(AbstractGangTask* task);
-
-  // Prepare compaction extension support.
-  void prepare_compaction_ext();
-  void prepare_compaction_common();
 };